a hash function is a function which when given a key, generates an address in the table. A hash function always returns a number for an object. Two equal objects will always have the same number while two unequal objects might not always have different numbers. ...
This Java Hashtable example describes the basic operation performed on the hashtable. */ import java.util.Hashtable; import java.util.Enumeration; public class HashtableExample{ public static void main(String args[]){ // constructs a new empty hashtable with default initial capacity Hashtable ha...
at java.util.Hashtable.hash(Unknown Source) at java.util.Hashtable.put(Unknown Source) at test.core.MapExamples.main(MapExamples.java:12) 1.3. Legacy Hashtableis legacy classand was not part of the initial Java Collections Framework (later it was included in JDK 1.2).HashMapis part of Co...
测试代码演示 代码语言:java 复制 packagecom.example.javase.collection;importjava.util.Hashtable;/** * @author ms * @date 2023/10/25 16:26 */publicclassHashtableTest{publicstaticvoidmain(String[]args){Hashtable<String,Integer>map=newHashtable<>();map.put("a",1);map.put("b",2);map.p...
先附源码:package java.util;import java.io.*;/** * This class implements a hash table, which maps keys to values. Any * non-null object can be used as a ke
This example creates a hashtable of numbers. It uses the names of the numbers as keys: Hashtable<String, Integer> numbers = new Hashtable<String, Integer>(); numbers.put("one", 1); numbers.put("two", 2); numbers.put("three", 3); To retrieve a number, use the following code:...
void load(InputStream inStream) : 从属性文件中加载key-value对。 void store(OutputStream out, String comments): 将properties中的key-value对输出到指定的文件中。 importjava.io.FileReader;importjava.io.FileWriter;importjava.io.IOException;importjava.util.Properties;/*** @ClassName PropertiesExample ...
This example creates a hashtable of numbers. It uses the names of the numbers as keys: text/java Copy {@code Hashtable<String, Integer> numbers = new Hashtable<String, Integer>(); numbers.put("one", 1); numbers.put("two", 2); numbers.put("three", 3);} To retrieve a number...
// Java program to demonstrate the// usage of Synchronized HashMapimportjava.util.Collections;importjava.util.HashMap;importjava.util.Iterator;importjava.util.Map;importjava.util.Set;publicclassHashMapSyncExample{publicstaticvoidmain(Stringargs[]){// Creating HashMapHashMap<Integer,String>hmap=newHas...
<p> * * This example creates a hashtable of numbers. It uses the names of * the numbers as keys: * <p><blockquote><pre> * Hashtable numbers = new Hashtable(); * numbers.put("one", new Integer(1)); * numbers.put("two", new Integer(2)); * numbers.put("three", new ...